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Karyology of the Atlantic forest rodent Juliomys (Cricetidae): a new karyotype from southern Brazil
Paresque, Roberta; Christoff, Alexandre Uarth; Fagundes, Valéria.
  • Paresque, Roberta; Universidade Federal do Espírito Santo. Centro de Ciências Humanas e Naturais. Departamento de Ciências Biológicas. Vitória. BR
  • Christoff, Alexandre Uarth; Universidade Luterana do Brazil. Museu de Ciências Naturais. Porto Alegre. BR
  • Fagundes, Valéria; Universidade Federal do Espírito Santo. Centro de Ciências Humanas e Naturais. Departamento de Ciências Biológicas. Vitória. BR
Genet. mol. biol ; 32(2): 301-305, 2009. ilus, tab
Artículo en Inglés | LILACS | ID: lil-513947
ABSTRACT
Juliomys is a small rodent from the family Cricetidae which inhabits the Atlantic forest and forests from Argentina to eastern Brazil. The three species recognized so far have different karyotypes. In this paper, we describe a new karyotype with 2n = 32, FN = 48 found in Juliomys specimens from a high-altitude area in the Atlantic forest of southern Brazil. The karyotype was analyzed after G- and C-banding and silver staining of the nucleolus organizer regions (Ag-NOR) and its G-banding patterns were compared with those of the newly described species Juliomys ossitenuis (2n = 20, FN = 36). The 2n = 32 karyomorph presented peculiar features and was very different from those of the other species of the genus J. pictipes (2n = 36, FN = 34), J. rimofrons (2n = 20, FN = 34) and J. ossitenuis (2n = 20, FN = 36). Differences were mostly due to centric and tandem fusions, pericentric inversion and loss of heterochromatin. The karyotype represents a powerful tool to differentiate Juliomys species and our data suggest that the karyotype described herein belongs to a new species.

Texto completo: Disponible Índice: LILACS (Américas) País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Genet. mol. biol Asunto de la revista: Genética Año: 2009 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Universidade Federal do Espírito Santo/BR / Universidade Luterana do Brazil/BR

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Texto completo: Disponible Índice: LILACS (Américas) País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Genet. mol. biol Asunto de la revista: Genética Año: 2009 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Universidade Federal do Espírito Santo/BR / Universidade Luterana do Brazil/BR